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<pre><span class="sourceLineNo">001</span>/**<a name="line.1"></a>
<span class="sourceLineNo">002</span> * Copyright (c) 2004-2016 QOS.ch<a name="line.2"></a>
<span class="sourceLineNo">003</span> * All rights reserved.<a name="line.3"></a>
<span class="sourceLineNo">004</span> *<a name="line.4"></a>
<span class="sourceLineNo">005</span> * Permission is hereby granted, free  of charge, to any person obtaining<a name="line.5"></a>
<span class="sourceLineNo">006</span> * a  copy  of this  software  and  associated  documentation files  (the<a name="line.6"></a>
<span class="sourceLineNo">007</span> * "Software"), to  deal in  the Software without  restriction, including<a name="line.7"></a>
<span class="sourceLineNo">008</span> * without limitation  the rights to  use, copy, modify,  merge, publish,<a name="line.8"></a>
<span class="sourceLineNo">009</span> * distribute,  sublicense, and/or sell  copies of  the Software,  and to<a name="line.9"></a>
<span class="sourceLineNo">010</span> * permit persons to whom the Software  is furnished to do so, subject to<a name="line.10"></a>
<span class="sourceLineNo">011</span> * the following conditions:<a name="line.11"></a>
<span class="sourceLineNo">012</span> *<a name="line.12"></a>
<span class="sourceLineNo">013</span> * The  above  copyright  notice  and  this permission  notice  shall  be<a name="line.13"></a>
<span class="sourceLineNo">014</span> * included in all copies or substantial portions of the Software.<a name="line.14"></a>
<span class="sourceLineNo">015</span> *<a name="line.15"></a>
<span class="sourceLineNo">016</span> * THE  SOFTWARE IS  PROVIDED  "AS  IS", WITHOUT  WARRANTY  OF ANY  KIND,<a name="line.16"></a>
<span class="sourceLineNo">017</span> * EXPRESS OR  IMPLIED, INCLUDING  BUT NOT LIMITED  TO THE  WARRANTIES OF<a name="line.17"></a>
<span class="sourceLineNo">018</span> * MERCHANTABILITY,    FITNESS    FOR    A   PARTICULAR    PURPOSE    AND<a name="line.18"></a>
<span class="sourceLineNo">019</span> * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE<a name="line.19"></a>
<span class="sourceLineNo">020</span> * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION<a name="line.20"></a>
<span class="sourceLineNo">021</span> * OF CONTRACT, TORT OR OTHERWISE,  ARISING FROM, OUT OF OR IN CONNECTION<a name="line.21"></a>
<span class="sourceLineNo">022</span> * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.<a name="line.22"></a>
<span class="sourceLineNo">023</span> *<a name="line.23"></a>
<span class="sourceLineNo">024</span> */<a name="line.24"></a>
<span class="sourceLineNo">025</span>package org.slf4j.impl;<a name="line.25"></a>
<span class="sourceLineNo">026</span><a name="line.26"></a>
<span class="sourceLineNo">027</span>import static org.junit.Assert.assertEquals;<a name="line.27"></a>
<span class="sourceLineNo">028</span><a name="line.28"></a>
<span class="sourceLineNo">029</span>import java.io.PrintStream;<a name="line.29"></a>
<span class="sourceLineNo">030</span>import java.util.ArrayList;<a name="line.30"></a>
<span class="sourceLineNo">031</span>import java.util.List;<a name="line.31"></a>
<span class="sourceLineNo">032</span>import java.util.Random;<a name="line.32"></a>
<span class="sourceLineNo">033</span>import java.util.concurrent.BrokenBarrierException;<a name="line.33"></a>
<span class="sourceLineNo">034</span>import java.util.concurrent.CyclicBarrier;<a name="line.34"></a>
<span class="sourceLineNo">035</span>import java.util.concurrent.atomic.AtomicLong;<a name="line.35"></a>
<span class="sourceLineNo">036</span><a name="line.36"></a>
<span class="sourceLineNo">037</span>import org.junit.After;<a name="line.37"></a>
<span class="sourceLineNo">038</span>import org.junit.Before;<a name="line.38"></a>
<span class="sourceLineNo">039</span>import org.junit.Test;<a name="line.39"></a>
<span class="sourceLineNo">040</span>import org.slf4j.Logger;<a name="line.40"></a>
<span class="sourceLineNo">041</span>import org.slf4j.LoggerFactory;<a name="line.41"></a>
<span class="sourceLineNo">042</span>import org.slf4j.LoggerFactoryFriend;<a name="line.42"></a>
<span class="sourceLineNo">043</span><a name="line.43"></a>
<span class="sourceLineNo">044</span>public class MultithreadedInitializationTest {<a name="line.44"></a>
<span class="sourceLineNo">045</span><a name="line.45"></a>
<span class="sourceLineNo">046</span>    final static int THREAD_COUNT = 4 + Runtime.getRuntime().availableProcessors() * 2;<a name="line.46"></a>
<span class="sourceLineNo">047</span><a name="line.47"></a>
<span class="sourceLineNo">048</span>    private static AtomicLong EVENT_COUNT = new AtomicLong(0);<a name="line.48"></a>
<span class="sourceLineNo">049</span><a name="line.49"></a>
<span class="sourceLineNo">050</span>    final CyclicBarrier barrier = new CyclicBarrier(THREAD_COUNT + 1);<a name="line.50"></a>
<span class="sourceLineNo">051</span><a name="line.51"></a>
<span class="sourceLineNo">052</span>    int diff = new Random().nextInt(10000);<a name="line.52"></a>
<span class="sourceLineNo">053</span>    String loggerName = "org.slf4j.impl.MultithreadedInitializationTest";<a name="line.53"></a>
<span class="sourceLineNo">054</span>    private final PrintStream oldErr = System.err;<a name="line.54"></a>
<span class="sourceLineNo">055</span>    StringPrintStream sps = new StringPrintStream(oldErr);<a name="line.55"></a>
<span class="sourceLineNo">056</span><a name="line.56"></a>
<span class="sourceLineNo">057</span>    @Before<a name="line.57"></a>
<span class="sourceLineNo">058</span>    public void setup() {<a name="line.58"></a>
<span class="sourceLineNo">059</span>        LoggerFactoryFriend.reset();<a name="line.59"></a>
<span class="sourceLineNo">060</span>        System.setErr(sps);<a name="line.60"></a>
<span class="sourceLineNo">061</span>    }<a name="line.61"></a>
<span class="sourceLineNo">062</span><a name="line.62"></a>
<span class="sourceLineNo">063</span>    @After<a name="line.63"></a>
<span class="sourceLineNo">064</span>    public void tearDown() throws Exception {<a name="line.64"></a>
<span class="sourceLineNo">065</span>        LoggerFactoryFriend.reset();<a name="line.65"></a>
<span class="sourceLineNo">066</span>        System.setErr(oldErr);<a name="line.66"></a>
<span class="sourceLineNo">067</span>    }<a name="line.67"></a>
<span class="sourceLineNo">068</span><a name="line.68"></a>
<span class="sourceLineNo">069</span>    @Test<a name="line.69"></a>
<span class="sourceLineNo">070</span>    public void multiThreadedInitialization() throws InterruptedException, BrokenBarrierException {<a name="line.70"></a>
<span class="sourceLineNo">071</span>        System.out.println("THREAD_COUNT=" + THREAD_COUNT);<a name="line.71"></a>
<span class="sourceLineNo">072</span>        LoggerAccessingThread[] accessors = harness();<a name="line.72"></a>
<span class="sourceLineNo">073</span><a name="line.73"></a>
<span class="sourceLineNo">074</span>        for (LoggerAccessingThread accessor : accessors) {<a name="line.74"></a>
<span class="sourceLineNo">075</span>            EVENT_COUNT.getAndIncrement();<a name="line.75"></a>
<span class="sourceLineNo">076</span>            accessor.logger.info("post harness");<a name="line.76"></a>
<span class="sourceLineNo">077</span>        }<a name="line.77"></a>
<span class="sourceLineNo">078</span><a name="line.78"></a>
<span class="sourceLineNo">079</span>        Logger logger = LoggerFactory.getLogger(loggerName + ".slowInitialization-" + diff);<a name="line.79"></a>
<span class="sourceLineNo">080</span>        logger.info("hello");<a name="line.80"></a>
<span class="sourceLineNo">081</span>        EVENT_COUNT.getAndIncrement();<a name="line.81"></a>
<span class="sourceLineNo">082</span><a name="line.82"></a>
<span class="sourceLineNo">083</span>        assertEquals(0, sps.stringList.size());<a name="line.83"></a>
<span class="sourceLineNo">084</span>    }<a name="line.84"></a>
<span class="sourceLineNo">085</span><a name="line.85"></a>
<span class="sourceLineNo">086</span>    private static LoggerAccessingThread[] harness() throws InterruptedException, BrokenBarrierException {<a name="line.86"></a>
<span class="sourceLineNo">087</span>        LoggerAccessingThread[] threads = new LoggerAccessingThread[THREAD_COUNT];<a name="line.87"></a>
<span class="sourceLineNo">088</span>        final CyclicBarrier barrier = new CyclicBarrier(THREAD_COUNT + 1);<a name="line.88"></a>
<span class="sourceLineNo">089</span>        for (int i = 0; i &lt; THREAD_COUNT; i++) {<a name="line.89"></a>
<span class="sourceLineNo">090</span>            threads[i] = new LoggerAccessingThread(barrier, i);<a name="line.90"></a>
<span class="sourceLineNo">091</span>            threads[i].start();<a name="line.91"></a>
<span class="sourceLineNo">092</span>        }<a name="line.92"></a>
<span class="sourceLineNo">093</span><a name="line.93"></a>
<span class="sourceLineNo">094</span>        barrier.await();<a name="line.94"></a>
<span class="sourceLineNo">095</span>        for (int i = 0; i &lt; THREAD_COUNT; i++) {<a name="line.95"></a>
<span class="sourceLineNo">096</span>            threads[i].join();<a name="line.96"></a>
<span class="sourceLineNo">097</span>        }<a name="line.97"></a>
<span class="sourceLineNo">098</span>        return threads;<a name="line.98"></a>
<span class="sourceLineNo">099</span>    }<a name="line.99"></a>
<span class="sourceLineNo">100</span><a name="line.100"></a>
<span class="sourceLineNo">101</span>    static class LoggerAccessingThread extends Thread {<a name="line.101"></a>
<span class="sourceLineNo">102</span>        final CyclicBarrier barrier;<a name="line.102"></a>
<span class="sourceLineNo">103</span>        Logger logger;<a name="line.103"></a>
<span class="sourceLineNo">104</span>        int count;<a name="line.104"></a>
<span class="sourceLineNo">105</span><a name="line.105"></a>
<span class="sourceLineNo">106</span>        LoggerAccessingThread(CyclicBarrier barrier, int count) {<a name="line.106"></a>
<span class="sourceLineNo">107</span>            this.barrier = barrier;<a name="line.107"></a>
<span class="sourceLineNo">108</span>            this.count = count;<a name="line.108"></a>
<span class="sourceLineNo">109</span>        }<a name="line.109"></a>
<span class="sourceLineNo">110</span><a name="line.110"></a>
<span class="sourceLineNo">111</span>        public void run() {<a name="line.111"></a>
<span class="sourceLineNo">112</span>            try {<a name="line.112"></a>
<span class="sourceLineNo">113</span>                barrier.await();<a name="line.113"></a>
<span class="sourceLineNo">114</span>            } catch (Exception e) {<a name="line.114"></a>
<span class="sourceLineNo">115</span>                e.printStackTrace();<a name="line.115"></a>
<span class="sourceLineNo">116</span>            }<a name="line.116"></a>
<span class="sourceLineNo">117</span>            logger = LoggerFactory.getLogger(this.getClass().getName() + "-" + count);<a name="line.117"></a>
<span class="sourceLineNo">118</span>            logger.info("in run method");<a name="line.118"></a>
<span class="sourceLineNo">119</span>            EVENT_COUNT.getAndIncrement();<a name="line.119"></a>
<span class="sourceLineNo">120</span>        }<a name="line.120"></a>
<span class="sourceLineNo">121</span>    };<a name="line.121"></a>
<span class="sourceLineNo">122</span><a name="line.122"></a>
<span class="sourceLineNo">123</span>    public static class StringPrintStream extends PrintStream {<a name="line.123"></a>
<span class="sourceLineNo">124</span><a name="line.124"></a>
<span class="sourceLineNo">125</span>        public static final String LINE_SEP = System.getProperty("line.separator");<a name="line.125"></a>
<span class="sourceLineNo">126</span>        PrintStream other;<a name="line.126"></a>
<span class="sourceLineNo">127</span>        List&lt;String&gt; stringList = new ArrayList&lt;String&gt;();<a name="line.127"></a>
<span class="sourceLineNo">128</span><a name="line.128"></a>
<span class="sourceLineNo">129</span>        public StringPrintStream(PrintStream ps) {<a name="line.129"></a>
<span class="sourceLineNo">130</span>            super(ps);<a name="line.130"></a>
<span class="sourceLineNo">131</span>            other = ps;<a name="line.131"></a>
<span class="sourceLineNo">132</span>        }<a name="line.132"></a>
<span class="sourceLineNo">133</span><a name="line.133"></a>
<span class="sourceLineNo">134</span>        public void print(String s) {<a name="line.134"></a>
<span class="sourceLineNo">135</span>            other.print(s);<a name="line.135"></a>
<span class="sourceLineNo">136</span>            stringList.add(s);<a name="line.136"></a>
<span class="sourceLineNo">137</span>        }<a name="line.137"></a>
<span class="sourceLineNo">138</span><a name="line.138"></a>
<span class="sourceLineNo">139</span>        public void println(String s) {<a name="line.139"></a>
<span class="sourceLineNo">140</span>            other.println(s);<a name="line.140"></a>
<span class="sourceLineNo">141</span>            stringList.add(s);<a name="line.141"></a>
<span class="sourceLineNo">142</span>        }<a name="line.142"></a>
<span class="sourceLineNo">143</span><a name="line.143"></a>
<span class="sourceLineNo">144</span>        public void println(Object o) {<a name="line.144"></a>
<span class="sourceLineNo">145</span>            other.println(o);<a name="line.145"></a>
<span class="sourceLineNo">146</span>            stringList.add(o.toString());<a name="line.146"></a>
<span class="sourceLineNo">147</span>        }<a name="line.147"></a>
<span class="sourceLineNo">148</span>    };<a name="line.148"></a>
<span class="sourceLineNo">149</span><a name="line.149"></a>
<span class="sourceLineNo">150</span>}<a name="line.150"></a>




























































</pre>
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